The invention concerns new computer aided methods and apparatus for designing objects, particularly 3D objects, and especially those having a sculpted form such as found in automobiles, boats, planes, furniture and certain fashion apparel items. Preferred embodiments employ optical sensing of the designers' hands, fingers, or styling implements, or his sketches, in conjunction with large screen displays and several novel software based methods which have the further advantage of direct interface to conventional CAD (Computer Aided design) systems which are then used to physically manifest the results as models, tooling or whatever. Use of the invention not only saves time and cost, but allows, in a "natural" way, much greater freedom of expression for the artist/designer than any known computer based system.